Biomedical subjects
L A Ozick
Publications and source records attributed to L A Ozick.
Hepatotoxicity from isoniazid and rifampin in inner-city AIDS patients.
OBJECTIVE: To determine the incidence of hepatotoxicity due to isoniazid and rifampin in inner-city patients with active tuberculosis. DESIGN: A hospital-based review of 70 consecutive in-patients in a 770-bed, inner-city hospital. The patient population is primarily African-American and Hispanic. METHODS: Fifty-eight men and 12 women were followed from 2-12 wk (median 4 wk). Patients had to be treated for at least 2 wk to be eligible for the study. Patients were excluded if they had been on any anti-tuberculous or any other hepatotoxic drug during the 2-month period before their hospitalization. Aminotransferases, alkaline phosphatase, bilirubin, and albumin were obtained at least every 2 wk. RESULTS: Hepatocellular toxicity, defined as AST and/or ALT greater than 200 IU/L, occurred in eight out of 70 (11.4%) patients. The mean age of these patients was 38.9 yr (22-58 yr). Patients with AIDS were significantly more likely to develop hepatotoxicity than those with any other risk factor (p < 0.01). CONCLUSIONS: Baseline aminotransferases followed by monitoring may be necessary in AIDS patients.
Distribution of adenomatous polyps in African-Americans.
OBJECTIVES: Previous research has suggested that polyps and colon cancer occur more commonly in the right colon in African-Americans compared with the general population. The purpose of this study is to determine the pattern of distribution of colonic polyps in African-Americans. METHODS: We retrospectively evaluated 141 colonoscopies in which 179 polypectomies were done. The polyps were described on the basis of anatomical distribution, gross description, size, and histology. Sixty-nine males and 72 females had colonoscopic polypectomies. The mean age was 67 yr (range, 43-91 yr). RESULTS: Seventy-seven (43%) were classified as left sided, and 102 (57%) were right sided. Left-sided polyps were more likely to be pedunculated than right-sided polyps (p < 0.01). Larger polyps were more common on the left side than the right side (p < 0.01), but villous histology was almost as high on the right side as on the left side. Polyps that had the highest malignant potential were found almost as commonly on the right side as on the left side. CONCLUSIONS: This study supports previous work that suggests that there is a significant shift to the right in the anatomical distribution of polyps in African-Americans. It also shows that the malignant potential is as high for right-sided polyps as it is for those on the left. Current screening recommendations may not be effective enough for preventing colon cancer in this population.
Pathogenesis, diagnosis, and treatment of diverticular disease of the colon.
Diverticular disease of the colon is a disease of twentieth century Western society. A diverticulum is an outpouching of mucosa through the colonic wall. Etiology and pathogenesis are related to altered colonic structure and physiology in an aging population. Epidemiological evidence suggests that a decrease in dietary fiber, as well as increasing age, lead to formation of diverticula. Diverticular disease includes pain without inflammation, diverticulitis, and bleeding. Severe diverticulitis is often complicated by abscess or fistula formation or peritonitis. Young obese men and immunocompromised patients have a more virulent course. Diverticular bleeding occurs as a result of a diverticulum eroding through a nutrient artery. Treatment of diverticular disease depends on severity and clinical presentation. A higher-fiber diet is recommended if there is no acute inflammation. Broad-spectrum antibiotics, diagnostic and therapeutic computed tomography scans, and early surgical intervention have improved the treatment of hospitalized patients with diverticular disease. The one-stage operation has increased in popularity for patients with localized disease because it reduces reoperative rates and hospitalization costs. Mortality remains high in patients with purulent and fecal peritonitis, and early recognition and treatment may benefit this subset of patients.
Transfusion-related chronic liver disease in sickle cell anemia.
The medical records and liver biopsies of nine sickle cell patients with chronically elevated liver function tests were retrospectively reviewed to determine the etiology of chronic liver disease. There were eight women and one man with a mean age of 30 yr. All patients had hemoglobin SS. Eight patients were referred for elevated aminotransferases and one for an elevated alkaline phosphatase. Hemosiderosis was present in all of the biopsies. Two patients had cirrhosis. Chronic hepatitis was noted in two patients, and five patients had cholestasis. Two patients had serologic markers demonstrating HBV exposure but no patients were HBsAg positive. Erythrophagocytosis, sinusoidal dilatation, and Kupffer cell hyperplasia were present in all of the liver biopsies. Transfusion-related causes were the most common significant pathologic findings in our patients, and appeared to be the etiologies of chronic liver disease in sickle cell patients.